Unveiling the initial oxidation mechanism of a single crystal Ni-based superalloy with pre-deformation

被引：6
|
作者：
Ren, Jing [1 ]
Hu, Ye-Bing [2 ]
Cao, Tie-Shan [1 ]
Cheng, Cong-Qian [1 ]
Zhang, Li [3 ]
Zhao, Jie [1 ]
机构：
[1] Dalian Univ Technol, Sch Mat Sci & Engn, 2 Linggong Rd, Dalian 116024, Peoples R China
[2] Dalian Univ Technol, Sch Mech Engn, 2 Linggong Rd, Dalian 116024, Peoples R China
[3] Beijing Key Lab Aeronaut Mat Testing & Evalut, Beijing 100095, Peoples R China
来源：
CORROSION SCIENCE | 2024年 / 234卷
关键词：
Initial; Oxidation; Mechanism; Dislocation; Diffusion; Resistance; LOW-CYCLE FATIGUE; DEGREES-C; SURFACE DEFORMATION; BEHAVIOR; 1000-DEGREES-C; STRESS; ALLOYS; GROWTH; AIR; TEM;
D O I：
10.1016/j.corsci.2024.112146
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The role of pre-deformation on the initial oxidation mechanism of a single crystal Ni- was revealed. With predeformation, the recrystallized grain boundaries and dislocations provided sites for the nucleation of Al 2 O 3 and enhanced the diffusion flux of Al irrespective of gamma/gamma ' interface, gamma ' , and gamma phase. Ultimately, a thin compact alpha-Al 2 O 3 layer formed, improving the oxidation resistance. Without pre-deformation, Ni and Al atoms diffused along the gamma'/gamma interface, however, the Al -flux is insufficient to maintain the growth of Al 2 O 3 . As a result, a loose multilayer film formed on the surface, which decreased the oxidation resistance.
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页数：9
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